I am a retired engineer studying physics as a retirement project and my question concerns special relativity. Einstein was able to produce his time dilation and mass/energy equivalence equations entirely from the posit that C is invariant. The maths is not hard and experimental evidence confirms time dilation occurs of the order of the calculations. Now it occurs to me that if the particles in the atom are spinning with a tangential velocity of C then the vector velocity of the particle is the combination of the spinning motion within the atom and any motion of the atom itself, This velocity would be always be greater than C whatever the direction of motion of the atom. If all the particles have the same age, time would become absolute and be applied to the particles and then it would be the velocity that changed and time dilation would occur exactly as Einstein calculated. Interestingly C would still be invariant but effect not cause. Further if these particles are spinning at C then the kinetic energy of the particles is the sum of mass times C squared /2. If this is the energy trying to get out then it follows that the energy holding the atom together must be equal to this. If you add these energies together you get Einstein's equation E=MC squared. Now I am aware that this would mean that general relativity would be entirely different, space would not curve and an explanation would be needed for gravitational lensing. Further development of the idea seems to satisfy gravitational lensing and the standard model and even maybe explains entanglement. So my feeling is I cant be the only one to have thought of this it must have been considered and rejected. My question is why?